a) There are four kinds of coal depending on their carbon content. ⇒ False
b) Coal is usually found in liquid state. ⇒ False
c) Fossil fuels are the result of the descomposition of plants and animals from the past. ⇒ True
d) Petroleum is the cheapest source of energy.⇒ True
First it is a kind of protein that is capable of pumping out compounds. For example, sodium potassium ATPhase is a transmembrane pump that pumps out 3 Na+ ions for the cell.
They both have similar environments, which show they have evolved similar behaviors and appearances. hope this helps <3
Abiogenesis is a theory that states that life sprang from non-living chemicals eons ago. This is an example of spontaneous generation, a former law that said life could arise from non-life.